英语词汇“medullary sheath”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	medullary sheath
释义	medullary sheath noun 1. : the layer of myelin surrounding a medullated nerve fiber 2. : the outer layers of smaller usually thick-walled cells that merge into the central pithy part of the core of many plant stems
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